1118525409 has 64 divisors (see below), whose sum is σ = 1744934400. Its totient is φ = 707616000.

The previous prime is 1118525399. The next prime is 1118525431. The reversal of 1118525409 is 9045258111.

It is not a de Polignac number, because 1118525409 - 2⁴ = 1118525393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1118525479) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10261647 + ... + 10261755.

It is an arithmetic number, because the mean of its divisors is an integer number (27264600).

Almost surely, 2^1118525409 is an apocalyptic number.

It is an amenable number.

1118525409 is a deficient number, since it is larger than the sum of its proper divisors (626408991).

1118525409 is a wasteful number, since it uses less digits than its factorization.

1118525409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343 (or 337 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 36.

The square root of 1118525409 is about 33444.3628882357. The cubic root of 1118525409 is about 1038.0428579985.

The spelling of 1118525409 in words is "one billion, one hundred eighteen million, five hundred twenty-five thousand, four hundred nine".